<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form
        label-position="top"
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.aatr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.aatr_id">
              <!-- 文本输入框 -->
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 步骤条索引
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        // 图片数组
        pics: [],
        // 详情描述
        goods_introduce: '',
        attrs: [],
      },
      // 验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      // 分类列表
      cateList: [],
      // 配置对象
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      previewPath: '',
      previewVisible: false,
    };
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories');
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！');
      }
      this.cateList = res.data;
      console.log(this.cateList);
    },
    // 级联选择器选项变化，触发函数
    handleChange() {
      // console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类');
        return false;
      }
    },
    // tab点击事件
    async tabClicked() {
      // 访问动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.addForm.goods_cat[2]}/attributes`,
          {
            params: { sel: 'many' },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品动态参数列表失败！');
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ');
        });
        this.manyTableData = res.data;
        console.log(this.manyTableData);
      }
      // 访问静态属性面板
      else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.addForm.goods_cat[2]}/attributes`,
          {
            params: { sel: 'only' },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品静态属性失败！');
        }
        // res.data.forEach((item) => {
        //   item.attr_vals =
        //     item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ');
        // });
        this.onlyTableData = res.data;
        console.log(this.onlyTableData);
      }
    },
    // 移除图片
    handleRemove(file) {
      // 先获取临时路径
      const filePath = file.response.data.tmp_path;
      // 从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => {
        x.pic === filePath;
      });
      // 调用数组的splice方法，把图片信息对象从pics数组中移除
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // 拼接得到图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      // 将对象push到pics数组中
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    //图片预览
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    // 实现深拷贝函数
    deepCopy(obj) {
      let tmp = JSON.stringify(obj);
      let result = JSON.parse(tmp);
      return result;
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！');
        }
        // 预校验通过发起请求，先进行深拷贝，免去级联选择器的goods_cat数组冲突
        // lodash cloneDeep(obj)
        const deepCopyForm = this.deepCopy(this.addForm);
        deepCopyForm.goods_cat = deepCopyForm.goods_cat.join(',');
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          };
          this.addForm.attrs.push(newInfo);
        });
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        deepCopyForm.attrs = this.addForm.attrs;
        // console.log(deepCopyForm);
        // 发起请求添加商品，商品名唯一
        const { data: res } = await this.$http.post('goods', deepCopyForm);
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！');
        }
        this.$message.success('添加商品成功！');
        this.$router.push('/goods');
      });
    },
  },
  created() {
    this.getCateList();
  },
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>